2003 and up aviator navigator or cobra heads, Idler pulleys, crank pulley, 39lb injectors, altinator, supercharger manifold, supercharger intercooler, heat exchanger, heat exchanger pump & fluid tank, plenum, throttle body, stock air box or cold air kit, and prolly a 255 fuel pump. i think thats about everything big that think you would need. And yes you could easily get over 400rwhp on the eaton with a good crank pulley. And you could get around 500rwhp if you got a port job done on the blower which is around $600.00. but you also have to worry about your transmission which its working torque limit is 325 if its a t45
tranny. And if its a tr3650 its torque limit is 365. I hope this helped you man. If you need to know anything else let me know.